Previous life: In 2025, a mechanical professor at the University of Science and Technology Beijing died accidentally during an extreme test of a new material.
* This life: Travel back to 1975 and become an ordinary resident in "Fu'an Courtyard" in Nanluo Lane. His father was an old fitter at the Hongxing Steel Rolling Mill. He retired early due to a work-related injury, and his family was in ruins. Li Wenjun took his father's place and became a fitter apprentice in the steel rolling mill.
* Personality: Calm and rational, a technical madman, with a bottom line but not a holy mother, and scornful of the "market philosophy" of being clever.
3. Core Conflict
*Technical generation gap: Senior engineers with mechanical engineering knowledge from the next few decades are fighting for dimensionality reduction in the industrial environment of the 1970s.
* Conflict of concepts: The fierce collision between the contract spirit and property rights awareness of modern engineers and the "old managers" who "equalize the rich and poor" and morally kidnap the courtyard.
* Class jump: From a marginalized apprentice, through technology, he gradually becomes an industrial pillar, and even affects the country's industrial process.
